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Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Impaired Loans and Associated Reserves (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Principal balance $ 6,462 $ 6,478
Total recorded investment [1] 5,834 5,878
Recorded investment for which there is no related allowance [1] 5,834 5,878
Recorded investment for which there is a related allowance 0 0 [1]
Related allowance 0 0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]    
Principal balance 189 191
Total recorded investment [1] 189 191
Recorded investment for which there is no related allowance [1] 189 191
Recorded investment for which there is a related allowance 0 0 [1]
Related allowance 0 0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]    
Principal balance 3,254 3,256
Total recorded investment [1] 2,639 2,665
Recorded investment for which there is no related allowance [1] 2,639 2,665
Recorded investment for which there is a related allowance 0 0 [1]
Related allowance 0 0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]    
Principal balance 2,719 2,721
Total recorded investment [1] 2,719 2,721
Recorded investment for which there is no related allowance [1] 2,719 2,721
Recorded investment for which there is a related allowance 0 0 [1]
Related allowance 0 0
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]    
Principal balance 300 310
Total recorded investment [1] 287 301
Recorded investment for which there is no related allowance [1] 287 301
Recorded investment for which there is a related allowance 0 0 [1]
Related allowance $ 0 $ 0
[1] Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.